LOS ANGELES, CA - NOVEMBER 18: (L-R) Singer Christina Aguilera and rapper Pitbull perform onstage during the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)

11. Pitbull - Don't Stop The Party

<> on August 9, 2012 in Los Angeles, California.

10. Ke$ha - C'Mon

LOS ANGELES, CA - NOVEMBER 18: Singer Kesha attends the 40th American Music Awards held at Nokia Theatre L.A. Live on November 18, 2012 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

9. Swedish House Mafia - Don't You Worry Child

NEW YORK, NY - DECEMBER 16: (FOR EDITORIAL USE ONLY) DJ's Axwell, Steve Angello and Sebastian Ingrosso of Swedish House Mafia perform at Madison Square Garden on December 16, 2011 in New York City. (Photo by Michael Loccisano/Getty Images)

8. Ke$ha - Die Young

arrives at the 2012 MTV Video Music Awards at Staples Center on September 6, 2012 in Los Angeles, California.

7. The Lumineers - Ho Hey

NASHVILLE, TN - DECEMBER 05: Wesley Schultz, Neyla Pekarek, and Jeremiah Fraites of The Lumineers speak onstage at The GRAMMY Nominations Concert Live!! held at Bridgestone Arena on December 5, 2012 in Nashville, Tennessee. (Photo by Kevin Winter/Getty Images)

performs onstage at the 54th Annual GRAMMY Awards held at Staples Center on February 12, 2012 in Los Angeles, California.

1. Macklemore - Thrift Shop

SEATTLE - APRIL 08: Seattle recording artist Macklemore performs a tribute to Mariners broadcaster Dave Niehaus, who passed away last November, prior to the Mariners' home opener against the Cleveland Indians at Safeco Field on April 8, 2011 in Seattle, Washington. (Photo by Otto Greule Jr/Getty Images)